In recent years, emerging markets have often raised interest rates in anticipation of the Fed’s slow and steady moves to avoid big swings in their currency values, which depend partly on interest rate differences across borders. But this set of rate increases is different: Inflation is running at its fastest pace in decades in many places, and a range of developed-economy central banks, including the European Central Bank, the Swiss National Bank, the Bank of Canada and the Reserve Bank of Australia, are joining — or may join — the Fed in pushing rates quickly higher.

“It’s not something we’ve seen in the last few decades,” said Bruce Kasman, chief economist and head of global economic research at JPMorgan Chase.

The last time so many major nations abruptly raised rates in tandem to fight such rapid inflation was in the 1980s, when the contours of global central banking were different: The 19-country euro currency bloc that the E.C.B. sets policy for did not exist yet, and global financial markets were less developed.

That so many central banks are now facing off against rapid inflation — and trying to control it by slowing their economies — increases the chance for market turmoil as an era of very low rates ends and as nations and companies try to adjust to changing capital flows. Those changing flows can influence whether countries and businesses are able to sell debt and other securities to raise money.

“Financial conditions have tightened due to rising, broad-based inflationary pressures, geopolitical uncertainty brought on by Russia’s war against Ukraine, and a slowdown in global growth,” Janet L. Yellen, the U.S. Treasury secretary, said in speech last week. “Now, portfolio investment is beginning to flow out of emerging markets.”

fastest pace since 1983. In the United Kingdom, it is similarly at a 40-year-high.

kick off rate increases back in December and has been steadily raising rates since. Policymakers are increasingly worried about inflation creating a cost-of-living crisis in Britain and worry that higher rates could compound economic pain. At the same time, they have signaled that they could act more forcefully, taking their cue from their global peers. There is a “willingness — should circumstances require — to adopt a faster pace of tightening,” Huw Pill, the chief economist of the Bank of England, said this month.

“Many central banks are looking at this as a sort of existential question about getting inflation and inflation expectations down,” said Matthew Luzzetti, chief U.S. economist at Deutsche Bank.

The Fed raised rates by a quarter point in March, half a point in May, and three-quarters of a percentage point in June. While its officials have predicted that they will maintain that pace in July, they have also been clear that an even bigger rate increase is possible.

“Inflation has to be our focus, every meeting and every day,” Christopher Waller, a Fed governor, said during a speech last week. “The spending and pricing decisions people and businesses make every day depend on their expectations of future inflation, which in turn depend on whether they believe the Fed is sufficiently committed to its inflation target.”

The Bank of Canada has already gone for a full percentage point move, surprising investors last week with its largest move since 1998, while warning of more to come.

said in a statement.

of other central banks have made big moves. More action is coming. Central banks around the world have been clear that they expect to keep moving borrowing costs higher into the autumn.

“I wouldn’t say we’re at peak tightening quite yet,” said Brendan McKenna, an economist at Wells Fargo. “We could go even more aggressive from here.”

A key question is what that will mean for the global economy. The World Bank in June projected in a report that global growth would slow sharply this year but remain positive. Still, there is “considerable” risk of a situation in which growth stagnates and inflation remains high, David Malpass, head of the World Bank, wrote.

If inflation does become entrenched, or even show signs of shifting expectations, central banks may have to respond even more aggressively than they are now, intentionally crushing growth.

Mr. Kasman said the open question, when it comes to the Fed, is: “How far have they gone toward the conclusion that they need to kick us in the teeth, here?”

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